Kathleen McCann walks to cast her vote in a runoff election Tuesday, Nov. 27, 2018 in Gulfport, Miss. Mississippi voters are deciding the last U.S. Senate race of the midterms, choosing between Democrat Mike Espy and Republican Sen. Cindy Hyde-Smith. John Fitzhugh, AP

Susan Fino, left, holds a sign for U.S. Senate candidate Mike Espy and Logan Liddy holds one for Susan Liddy, a candidate for judge in the Chancery Court, District 18, Place 1 race at the Oxford Community Center in Oxford, Miss. on Tuesday, November 27, 2018. Mississippians are casting their ballots in runoff elections, including a U.S. Senate race pitting Republican Cindy Hyde-Smith against Democrat Mike Espy. Bruce Newman, AP

Poll worker Phyllis Johnson puts stickers that read "I Voted" in a basket at a table at the polls at the Oxford Conference Center in Oxford, Miss. on Tuesday, Nov. 27, 2018. Mississippi voters are deciding the last U.S. Senate race of the midterms, choosing between Espy and Republican Sen. Cindy Hyde-Smith. Bruce Newman, AP

Larry Little, candidate for judge in the Chancery Court, District 18, Place 1 race, holds a sign at the polls in a runoff election at the Oxford Conference Center in Oxford, Miss. on Tuesday, Nov. 27, 2018. Bruce Newman, AP

L.M. Walker shows his identification to vote in a runoff election Tuesday, Nov. 27, 2018 in Gulfport, Miss. Mississippi voters are deciding the last U.S. Senate race of the midterms, choosing between Democrat Mike Espy and Republican Sen. Cindy Hyde-Smith. John Fitzhugh, AP

Graham Doty votes at the polls in a runoff election at the Oxford Conference Center in Oxford, Miss. on Tuesday, Nov. 27, 2018. Mississippi voters are deciding the last U.S. Senate race of the midterms, choosing between Espy and Republican Sen. Cindy Hyde-Smith. Bruce Newman, AP

Don Whitten votes at the polls in a runoff election at the Oxford Conference Center in Oxford, Miss. on Tuesday, Nov. 27, 2018. Mississippi voters are deciding the last U.S. Senate race of the midterms, choosing between Espy and Republican Sen. Cindy Hyde-Smith. Bruce Newman, AP

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Kathleen McCann walks to cast her vote in a runoff election Tuesday, Nov. 27, 2018 in Gulfport, Miss. Mississippi voters are deciding the last U.S. Senate race of the midterms, choosing between Democrat Mike Espy and Republican Sen. Cindy Hyde-Smith.(Photo: John Fitzhugh, AP)

With 68.7 percent of precincts reporting statewide, the Associated Press has called the race for incumbent U.S. Sen. Cindy Hyde-Smith. She currently leads Democratic challenger Mike Espy, 55.9 to 44.1 percent.

Hyde-Smith will become the first woman from Mississippi elected to Congress. Gov. Phil Bryant appointed her to the seat earlier this year after Sen. Thad Cochran retired April 1.

Hyde-Smith led a four-way race on Nov. 6 with 41.5 percent of the vote. Espy

7:30 p.m. The money rolled in for Mississippi's U.S. Senate special election and runoff. The campaigns for Espy and Hyde-Smith raised a combined $6.3 million and counting. Outside groups spent at least $10.6 million.

For the three weeks of the runoff, nearly $5 million was spent on television ads alone.

The Democratic National Committee reports it spent more than $830,000 on Mississippi Democratic candidates for the midterms, raised more than $300,000 for Espy via email slit fundraising and helped with GOTV efforts.

7 p.m.

The polls have closed. Results are expected to start coming in by 8 p.m. You can find live election results above or here.

6:50 p.m.

The pace of voter turnout was increasing late in the day as Mississippi residents decided a contentious special election for a U.S. Senate seat.

Tuesday's runoff pitted a Republican backed by President Donald Trump against a Democrat who's a former congressman and former U.S. agriculture secretary.

Appointed Republican Sen. Cindy Hyde-Smith and Democrat Mike Espy are competing for the final two years of a term started by retired Republican Sen. Thad Cochran.

Observers for the secretary of state's office estimate that 30 to 40 percent of registered voters are showing up at many precincts. The spokeswoman for the office, Leah Rupp Smith, says that's higher than earlier in the day.

6 p.m.

Major League Baseball will set new procedures for vetting political contributions after giving $5,000 to Republican U.S. Sen. Cindy Hyde-Smith of Mississippi and then asking for the money back after her remarks about a "public hanging."

Federal Election Commission records show MLB's political action committee made $472,500 in political contributions from the start of 2017 through this Oct. 17. That included two contributions of $2,500 to Hyde-Smith's campaign on June 26 and Sept. 24 this year. Her video-recorded remark was released later.

Baseball Commissioner Rob Manfred said Tuesday that the league's lobbyists "had a lot of discretion" with political contributions, and there's "going to be additional oversight here in New York."

MLB intends to have its legislative affairs committee discuss new procedures before making decisions.

11:35 a.m.

Leah Rupp Smith, spokeswoman for the Mississippi secretary of state's office, says voter turnout is "steady but slow" for a U.S. Senate runoff — the last of the midterm elections.

Voters are choosing between a white Republican backed by President Donald Trump and a black Democrat who's a former congressman and former U.S. agriculture secretary.

Appointed Republican Sen. Cindy Hyde-Smith and Democrat Mike Espy are competing for the final two years of a term started by retired Republican Sen. Thad Cochran.

Zakiya (zah-KEE-ah) Summers is an election commissioner in the state's largest county, Hinds. She says she hasn't seen long lines.

Hinds County is largely African-American, and high turnout there is important to Espy as he seeks to become Mississippi's first black U.S. senator since Reconstruction.

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Arriving in Gulfport, President Donald Trump exits Air Force One followed by U.S. senators Cindy Hyde-Smith and Roger Wicker. President Trump visited Biloxi to speak at a rally in support of sen. Hyde-Smith who faces a runoff on Tuesday against Mike Espy. Monday, Nov. 26, 2018. Sarah Warnock/Clarion Ledger

Incumbent U.S. Sen. Cindy Hyde-Smith sits next to President Donald Trump at a roundtable on criminal justice reform held at Mississippi Air National Guard base in Gulfport. President Trump and Vice President Mike Pence visited the Mississippi for a rallies supporting Hyde-Smith in the runoff between Hyde-Smith and Mike Espy on Tuesday. Monday, Nov. 26, 2018. Sarah Warnock/ Clarion Ledger

President Donald Trump gives a thumbs up to Mississippi state officials at a round table on criminal justice reform. President Trump visited the Mississippi gulf coast for a rally in Biloxi the day before the U.S. Senate race runoff between Senator Cindy Hyde-Smith and Mike Espy. Mississippi Air National Guard base, Monday, Nov. 26, 2018. Sarah Warnock/ Clarion Ledger

U.S. Sen. Cindy Hyde-Smith, President Donald Trump and Vice President Mike Pence listen as Jared Kushner speaks about current criminal justice reform efforts during a roundtable at the Mississippi Air National Guard base in Gulfport. Monday, Nov. 26, 2018. Sarah Warnock/Clarion Ledger

U.S. Vice President Mike Pence speaks during a round table on criminal justice reform with Mississippi state law enforcement officials in Gulfport at the Mississippi Air National Guard Base. Monday, Nov. 26, 2018. Sarah Warnock, Clarion Ledger

U.S. Sen. Cindy Hyde-Smith backed by President Donald Trump pauses as supporters cheer for her during the 'MAGA Christmas' rally held in Biloxi at the Mississippi Coast Coliseum. Hyde-Smith is in a runoff against Mike Espy for senate. Monday, Nov. 26, 2018. Sarah Warnock, Clarion Ledger

At a rally supporting incumbent Sen. Cindy Hyde-Smith for U.S. Senate in Biloxi, fans cheer as U.S. President Donald Trump speaks about construction progress for the border wall between Mexico and the southern U.S. border. Monday, Nov. 26, 2018. Sarah Warnock, Clarion Ledger

A family of president Trump supporters hold a sign supporting the Trump Pence administration at a rally supporting U.S. Sen. Cindy Hyde-Smith in Biloxi at the Mississippi Coast Coliseum. Monday, Nov. 26, 2018. Sarah Warnock, Clarion Ledger

A supporter of President Donald Trump holds up a handmade sign at the rally for incumbent U.S. Sen. Cindy Hyde-Smith in Biloxi at the Mississippi Coast Coliseum. Monday, Nov. 26, 2018. Sarah Warnock/Clarion Ledger

Mississippi Lt. Gov. Tate Reeves pauses before entering the stage to speak at the 'MAGA Christmas' rally at Biloxi's Mississippi Coast Coliseum. The rally was held in support of incumbent U.S. Sen. Cindy Hyde-Smith the evening before a run off between Hyde-Smith and Mike Espy for senate. Monday, Nov. 26, 2018. Sarah Warnock, Clarion Ledger

U.S. Vice President Mike Pence speaks to attendees of a rally in support of incumbent U.S. Sen. Cindy Hyde-Smith in Biloxi at the Mississippi Coast Coliseum. Monday, Nov. 26, 2018. Sarah Warnock, Clarion Ledger

President Donald Trump speaks to attendees of a rally in Biloxi the day before the U.S. Senate race runoff between U.S. Sen. Cindy Hyde-Smith and Mike Espy. Monday, Nov. 26, 2018. Sarah Warnock/ Clarion Ledger

Cindy Hyde-Smith speaks alongside President Donald Trump on Nov. 26, 2018, at the Mississippi Coast Coliseum in Biloxi. Trump asked for Mississippians to vote for Hyde-smith in the U.S. Senate runoff election on Nov. 27. Justin Mitchell

Charlie Clark, 74, is a New York City native has and lived in Mississippi for over 40 years. He took part in the Mississippi Rising Coalition protest of President Donald Trump’s rally to support U.S. Senate candidate Cindy Hyde-Smith in Biloxi on Nov. 26, 2018, one day before the runoff election between Republican Hyde-Smith and Democrat Mike Espy. Justin Mitchell

Danielle Dismuke-Rojas, 25, of Gulfport waves to drivers on U.S. 90 as she protests a rally hosted by President Donald Trump in Biloxi on Nov. 26, 2018. The Mississippi Rising Coalition hosted the protest. Trump was in Mississippi supporting Sen. Cindy Hyde-Smith in the runoff alection against Democrat Mike Espy. Justin MItchell

Some people in the crowd held "Merry Christmas Make America Great Again" signs as "Feliz Navidad" played at a rally hosted by President Donald Trump in support of Sen. Cindy Hyde-Smith in Biloxi, Miss., on Nov. 26, 2018. Justin Mitchell

Santa and Mrs. Claus throw out Trump swag to guests at a rally at the Mississippi Coast Coliesum in Biloxi on Nov. 26, 2007. Trump is in Missisisppi to support U.S. Senate candidate Cindy Hyde-Smith. Justin Mitchell

President Donald Trump speaks in support of Sen. Cindy Hyde-Smith in Biloxi, Miss., in Nov. 26, 2018, just one day before the U.S. Senate runoff election between Hyde-Smith, a Republican, and Democrat Mike Espy. Justin Mitchell